KR200235250Y1 - An electronic starter for driving a fluorescent lamp - Google Patents

Abstract

The present invention discloses an electronic starter such as a preheated fluorescent lamp.

Electronic starter according to the present invention, in the pre-heated fluorescent lamp consisting of choke coil, electronic starter and fluorescent lamp, SCR driver for preheating the fluorescent lamp instantaneously for a predetermined time, the SCR controller for controlling the SCR driver and the And a voltage detector for detecting and supplying a predetermined voltage to the SCR controller.

The SCR driving unit includes a first diode for rectifying an AC power applied to a fluorescent lamp, a first capacitor connected in parallel with the first diode, and a direct current rectified by the first diode to charge and discharge the charge. When a voltage of a predetermined magnitude is applied to the gate, the first SCR for preheating the fluorescent lamp through the output voltage and the AC power applied to the fluorescent lamp are turned on, and the cathode is turned on. And a second SCR connected in parallel to the anode of the SCR.

The voltage detector is charged with a second diode for rectifying the AC power applied to the fluorescent lamp, a DC power supplied by the second diode and discharged when the AC power is changed in polarity to supply power to the SCR controller. And a second zener diode that receives an output voltage of the second diode and a power supply of the predetermined size to the electrolytic capacitor.

In addition, the SCR controller is supplied with the DC power supplied from the voltage detector to the base, and the AC power applied to the fluorescent lamp is lowered to a predetermined size and supplied to the collector, thereby lowering the voltage to control the preheating time of the first SCR. A transistor is provided.

The present invention has a longer life and a faster lighting speed than the conventional electronic starter. In addition, it has the effect of prolonging the life of the fluorescent lamp, the production cost is low, and there is no flicker of the lamp to protect eyesight.

Description

An electronic starter for driving a fluorescent lamp

The present invention relates to an electronic starter for fluorescent lamps. In particular, the present invention relates to an electronic starter that extends the life of a preheated fluorescent lamp.

Fluorescent lamps are the most common lighting fixtures in homes and businesses. It is especially preferred because it consumes less power than ordinary incandescent lamps and is much brighter. A fluorescent lamp is a kind of discharge lamp, and Fig. 1 shows the configuration of a circuit of a conventional preheated fluorescent lamp. Fluorescent lamp is mainly composed of choke coil part, starter, fluorescent lamp.

When mercury vapor and argon gas are charged inside the fluorescent lamp and discharged by applying a high voltage to the electrodes at both ends, a large amount of ultraviolet light is emitted. When it is absorbed by the fluorescent material coated on the inner surface of the fluorescent lamp, the fluorescent material emits light. Fluorescent light is inherent. At this time, the filament constituting the electrode is coated with an electron emitting material, and the case where the electron emitting material emits free electrons at a high temperature is a preheated fluorescent lamp.

In the preheating lighting type, preheating should be performed until electron emission is smooth. That is, the role of a starter (also called a glow start lamp) is to be turned on by preheating.

In addition, the choke circuit is also called a ballast, and is a device that generates the high voltage required to discharge the fluorescent lamp. That is, after the instantaneous lighting of the fluorescent lamp is made, the lighting is turned on by the discharge inside the fluorescent lamp and a high voltage is required for this.

The inner surface of the fluorescent lamp is coated with a fluorescent paint, and there are electrodes made of filaments at both ends of the bulb. One side of the filament is connected to the alternating current power source through the choke circuit and the other is connected to the filament of the other electrode via the starter, which is in turn connected to the other terminal of the alternating current power source.

In the conventional start bulb, there are two electrodes and one electrode is configured to be connected to the other electrode by the principle of bimetal. Therefore, if the ambient temperature is too low or the input voltage falls below the rated voltage, the lighting does not turn well and flickers. This phenomenon has been developed to blackening of fluorescent lamps and shortening of lifespan of fluorescent lamps.

In addition, such a conventional starter has a long lighting time and a short lifespan, which is uneconomical.

Therefore, the electronic starter that appeared to solve this problem. However, the conventional electronic starter also has a longer life than the glow-lit lamp, but still not.

In addition, there is a problem that the temperature fuse is frequently broken during aging of the conventional electronic starter. This was one of the problems to be solved because it adversely affects the life of the electronic starter.

Another problem is that the lamp flickers when the fluorescent light is turned on, which makes the eyes tired and causes a decrease in vision when working in such an environment for a long time.

In addition, the lighting life of the fluorescent lamp was about 3,500 to 30,000 times, which was not very long, and the production cost was not small.

An object of the present invention is to provide an electronic starter for a preheated fluorescent lamp that can solve the various problems described above.

1 is an internal circuit diagram of a conventional preheating fluorescent lamp.

Figure 2a is a block diagram of an electronic starter circuit according to the present invention.

FIG. 2B is a detailed view of FIG. 2A; FIG.

<Brief description of the main parts of the drawings>

100: SCR driver 200: voltage detector

300: SCR control unit

A block diagram of a circuit of an electronic starter for a fluorescent lamp according to the present invention is shown in Fig. 2a and a detailed view thereof in Fig. 2b. When 220V AC power is applied to the fluorescent lamp as shown in FIG. 1, 220V is instantaneously supplied to the a-a 'terminal via a ballast (choke circuit) and a fluorescent lamp.

The electronic starter of the present invention consists of an SCR driver 100, a voltage detector 200, and an SCR controller 300. The detailed operation thereof will now be described with reference to the drawings.

The electronic starter of the present invention includes D01 and C01 as components for rectifying AC power. It also has two SCRs Q01 and Q02 to control preheating. Diode D01 is connected to the anode of Q01. This diode D01 is connected in parallel with the capacitor C01. The gate terminal of Q01 is connected to the resistor R01. A zener diode ZD01 is connected in parallel between the gate terminal of Q01 and R01.

When a positive current is applied to the terminal a, the current rectified by the diode D01 and the capacitor C01 is supplied to the anode of the Q01, and the voltage whose voltage drops by the predetermined voltage by the resistor R07 and the zener diode ZD01 becomes the voltage of Q01. The DC current applied to the gate and the rectified DC current is supplied to the fluorescent lamp through the cathode of Q01 and D02 to the fluorescent lamp via terminal a 'to preheat the fluorescent lamp. That is, Q02 maximizes the discharge of fluorescent lamps by repeatedly turning on and off by voltage control by ZD01.

When a positive current is applied to the terminal a, even if a positive voltage is applied to the gate of Q02 through the resistor R02, a negative voltage is applied to the anode of Q02 and Q02 is turned off.

Conversely, if a positive current is applied to the a 'terminal, a positive voltage is applied to the gate of Q02 by the resistor R06, and a positive voltage is also applied to the anode so that Q02 is on and Q01 is turned off. And Q02 discharges back electromotive force generated when Q01 is on, maximizing product protection and discharge of fluorescent lamp.

On the other hand, when a positive current is applied to terminal a, diode D03 is turned on, zener diode ZD02 and diode D05 are turned on in turn, and transistor Q03 is turned on. D03 serves to rectify alternating current into direct current and supply it to the transistor Q03. That is, it determines the kind of preheating time for Q03 to operate during half wave of AC.

The voltage rectified through diode D03 is divided at a ratio of 6.8: 100 at R05 and R09. In other words, a voltage of about 14V is applied to R05. The voltage produced at R05 is charged to C03 via ZD02.

The voltage charged to C03 activates Q03, which cuts off the voltage supplied through R04.

Diode D02 is connected to the cathode terminal of Q01. The role of D02 is to prevent reverse voltage penetration into Q01.

When a positive current is applied to the a 'terminal, ZD02, D01, D02, D03, D04, Q01, and Q03 are turned off. The emitter terminal of Q03 is connected with diode D04 to protect Q03 from sudden surge voltage. Because Q03 is for low voltage, it can be destroyed by momentary abnormal overvoltage.

If the current is transferred to Q03 through zener diode ZD02 while the preheat is turned on, Q03 is turned on and the current is supplied to the fluorescent lamp through the a 'terminal, and the fluorescent lamp is preheated to turn on instantaneously. When off, the electric charges charged in the electrolytic capacitor C03 are discharged and the preheating is completed.

Thereafter, the fluorescent lamp is discharged by the high voltage, thereby causing the electric current to conduct and emitting light, so that the starter no longer operates.

As a result of using the starter of the present invention, it was confirmed that the performance is much better than that of the conventional electronic starter. In other words, the lifespan of fluorescent lamps has improved to about 50,000 times, and the production cost is 1,200 won per unit, excluding VAT, based on domestic standards on March 1, 2001. It's only 1,000 won, so it's much cheaper. In addition, there is no flickering phenomenon when the fluorescent lamp is turned on, which may also help to protect eyesight.

The above effects of the present proposal are as follows.

First, the life is longer than conventional.

Second, the lighting speed is faster than the prior art.

Third, the production cost is low.

Fourth, the lifetime of the fluorescent lamp is long.

Fifth, it can protect eyesight.

Claims (2)

In the preheated fluorescent lamp consisting of choke coil, electronic starter and fluorescent lamp, An SCR driver for preheating and igniting the fluorescent lamp for a predetermined time; An SCR controller for controlling the SCR driver; And And a voltage detector for detecting and supplying a predetermined voltage to the SCR controller. The SCR drive unit, A first diode for rectifying an AC power applied to the fluorescent light fixture; A first capacitor connected in parallel with the first diode to charge and discharge a charge; A first SCR to which the DC current rectified by the first diode is applied to the anode, and when a voltage having a predetermined magnitude is applied to the gate, the first current is turned on to preheat the fluorescent lamp through the output voltage; And When the polarity of the AC power applied to the fluorescent lamp is changed is on and the cathode is provided with a second SCR connected in parallel to the anode of the first SCR, The voltage detection unit, A second diode for rectifying an AC power applied to the fluorescent light fixture; An electrolytic capacitor charged with the DC power supplied by the second diode and discharging when the AC power is changed in polarity to supply power to the SCR control unit and connected in parallel with a resistor having a predetermined size; And And a second zener diode configured to receive the output voltage of the second diode and supply power of a predetermined size to the electrolytic capacitor. The SCR control unit, A low voltage transistor is provided when the DC power supplied from the voltage detector is supplied to the base and the AC power applied to the fluorescent lamp is dropped to a predetermined size and supplied to the collector to control the preheating time of the first SCR. An electronic starter of a preheated fluorescent lamp characterized in that the light is made. 2. The transistor of claim 1, wherein a first zener diode for dropping and supplying the AC power supply by a predetermined size is connected to the gate side of the first SCR, and the transistor is protected from an abnormal voltage applied to the emitter side of the low voltage transistor. An electronic starter of a pre-heated fluorescent lamp, characterized in that it further comprises a diode for.